Door opener and closer for furnaces



- (No MmleL) 2 Sheets-Sheet 1. W A. JOYNER & G. N. PETESOH.

DOOR OPENER AND CLOSER FOR FURNACES. No. 358,977. Patented Mar. 8, 1887.

2 SheetsS11eet 2. PETESGH.

(No Model.)

' W. A. JOYNER & G. N.

DOOR OPENER AND CLOSER FOR FURNACES.

Pa ganteq Mar. 8, 1887.

UNITED STATES PATENT, Orrrca.

ILL. A. JOYNER AND CHARLES N. PETESCH, OF CHICAGO, ILLINOIS.

DOOR QPENER AND CLOSER FOR FURNACES.

SPECIFICATION forming part of Letters Patent No. 358,977, dated March 8,1887. Application filhd March 9.6, 1886. Serial No. 196,655. (No model.)

To aZZ whom it may concern.-

Be it known that WQVVILL. A. JOYNER and CHARLES N. Pnrnsorr, citizens ofthe United States of America, residing at Chicago, in the county of Cookand State of Illinois, have invented certain new and useful Improvementsin Door Openers and Closers for Boiler and otherFurnaces, of which thefollowing, in connection with the accompanying drawings, is aspecification.

The purpose of our invention is to provide new and useful means forenabling a fireman or stoker to rapidly open and close, as required, thedoors of boiler and other furnaces, while stoking or feeding the fire,without the aid ofhis hands.

In the drawings,Fignre 1 represents a front view of a furnace providedwith one form of our means for reducing our invention to practice,showing the parts in the position they occupy when the furnace-door isclosed. Fig. 2 is a front view ofthe parts,showing the same in theposition they occupy when the door is open, and also showing certainparts in section in order to more clearly illustrate their construction.Fig. 3 is a top or plan view of parts shown in Fig. 1. Fig. 4 is anendview of the parts shown in Fig. 1. Fig. 5 is a detail, the sameshowing the means employed for rotating the pintle on which thedoorishung. Fig. 6 is also a detail of the same parts viewed in thedirection of the ends of the anti-friction rollers, and Fig. 7 is asectional detail representing one modification of construction to allowthe parts to be operated by means of suction or partial vacuum.

Likeletters of reference indicate like parts.

A represents the front of a furnace, and B represents a furnace-door.This door is hinged to the furnace-front by means of lugs a a, and a isa pintle or shaft to which the lugs upon the door are rigidly connected,and which turns freely in the lugs upon the furnacefront.

O is a spiral extension upward of the pintle a.

D is a steam chest or chamber, and E is a piston-cylinder operating inconnection therewith.

F is the piston, and G the pistonrod. This rod passes freely through abox or lug H.

J is a steam-pipe entering the steam chamber orboiler, and also enteringthe steam chest or box D.

K is a sliding valve, and L and M are steamports, through which thecylinder E eommunicates with the said steam chest or box.

N is an exhaust port or channel.

0 is a valve-rod entering the chest or box D and in connection with thevalve K.

1 is a centrally-pivoted lever, one end of which is pivoted or jointedto the lower end of the rod 0.

Q is a vertical stud or post pivoted to the other end of the lever P.

R is a spring, bearing downward upon that side of the leverP which is inconnection with the rod 0.

S is an arm mounted adjustably on the rod G by means of a set-screw, T.The outer end of the arm S has thereon a loop, I), on the lateral armsof which are anti-friction rollers c c. The space between the rollers cc is such as to admit the spiral O to pass between them.

N is an exhaust-pipe entering or in communication with the exhaust ductor port N, in which a stop-cocl ,O, may be placed.

The operation of the parts is as follows: The steam passes from theboiler or steamgenerating chamber through the pipe J into the steamchest or box D, and thence either through the port L or through the portM, according to the position of the valve K, which always closes eitherone or the other of the said ports and leaves one or the other of themopen. The valve K. is somewhat concave or dishing on its working face,as shown at e, so that the exhaust may always pass out underneath thevalve into an exhaust or waste pipe, N.

It will be perceived on reference to Fig. 2 that the position of thevalve K is such as to close the port L, which isthe upper port, and openthe port M, which is the lower port, and hence that the steam-pressurewill exert itself upon the under side of the piston-head and raise thelatter in the piston-cylinder. As the piston moves upward, owing to thissteampressure, the piston-rod G of course also rises and carries with itthearm S. As the outer end of the arm S embraces the spiral G, and movesupward in a true vertical direction, the said spiral will be rotated,and hence the pintle or shaft a, to which it is attached, will also berotated. As the lugs which are applied to the door 13 are rigidlyconnected to the pintle a, the door will be opened as the piston movesupward. When the valve K covers the lower port, M, the steam will enterthe upper port and drive the piston downward. This downward movement ofthe piston reverses the direction in which the pintle a is rotated, andthe door will be closed and held firmly in that position, for the reasonthat the steam-pressure will exert its force so long as the upper valveremains open. As the piston moves either upward or downward, the steamin the cylinder E, which has once done its work, will escape or becondensed whenever the exhaust port or channel is open.

' To shift the valve K from the upper to the lower steam-port, andreversely, we employ the lever P, the spring B, and thestud or post Q.To raise the valve, the fireman simply presses his foot upon thestud Qwith sufficient force to depress that end of the lever P to which thesaid stud is applied, thereby raising the opposite end of the saidlever, and consequently carrylng the valve K to the upper port, L. Thelower port being thus open, the steam passes in through it, raises thepiston, and opens the door in the manner already described. After thefireman has finished stoking, he lifts his foot from the stud Q,whereupon the spring B depresses that end of the lever which is inconnection with the valverod, and the lever K is for that reason shiftedto cover the lower steam-port and open the upper one, which then admitsthe steam above the piston, and the door will be closed and held in thatposition until it may be desired to open it again.

It will be perceived from the foregoing description, and from referenceto the drawings, that the firemansattention will not be distracted fromhis work, and that the only thing necessary for him to do in order toopen the dooris to place his foot upon the studQ while stoking, and torelease the said stud after sufficient fuel has been supplied. It willalso be perceived that the force or power applied is derived from theboiler, so far as thus described-in this instance, that the supply ofsteam, which is always at hand when the boiler is fired up, is employedas the agent for working the mechanism which opens and closes the doorand holds it in position.

In Fig. 7 we have shown a modification of the piston-cylinder, for thepurpose of illustrating that the piston may also be worked by means of avacuum or partial vacuum in conjunction with a spring, A. B in themodification referred to is a pipe entering the lower portion ofthe'piston-eylinder, and C is an induction-pipe incommunication with thepipe B. D is a two-way cook or valve arranged in the pipe B at itsjunction with the pipe 0. The channels or ports in the cock D are suchas to permit the air to enter the piston-cylinder through the pipe 0 andthe inner end of the pipe B as the piston moves upward in its cylinder.To move the piston up inits cylinder, we depend upon the action of thespring A. To draw the piston down, we set the cock D so as to open thepipe B and close the pipe 0, and then exhaust the air from thepistoneylinder by connecting the pipe B with any of the well-known meansfor securing a partial vacuum. To work or turn or shift the cock Dinthis manner,wc employ alever, P, a rod, 0, and a stud, Q, as well asspring B, in like manner as the same parts are employed for the purposeof shifting the valve K; but we have not here shown the said parts inoperative connection with the said cock, as it will now be readilyunderstood how the same may be operated.

The door operating mechanism now described may be'applied to use inconnection 7 with the fire-boxdoors of locomotive-boilers, as well as inconnection with the corresponding doors of stationary boilers andfurnaces generally. We may also add that we would regard a weight as theequivalent of either of the springs referred to.

It is obvious that modifications in form or in modes of application ofthe foregoing mechanical combinations may he necessitated by certainconditions and different kinds of furnaces; also, that compressed air,hydraulic pressure, and electricity may severally be used as aconvenient power, as well as steam and partial vacuum, as alreadyrecited. Therefore we do not limit ourselves specifically to themechanical arrangement as described, nor to the motive power named inthe foregoing specification; but

What we claim as new, and desire to secure by Letters Patent, is

1. The combination, substantially as specified, of the door B of afire-box or furnace, of a door-pintle in rigid connection with the saiddoor and having a spiral extension thereon, of a vertically movable armin engagement with the said extension, a piston having its 7 rod inconnection with the said arm, a lever for controlling the valve of thepiston-cylinder, and an induction tube or pipe, for the purposes setforth.

2. The combination, substantially as specified, of the door B, having arotativc-pintle or shaft in rigid connection therewith, the

spiral pintle-extension C, the piston Fand its red, the arm S, appliedto the piston-rod. and engaging the said spiral, apiston-cylinder inoperative connection withinduction and eduction openings or portsentering a valve chamber or box, a valve for alternately opening andclosing the said ports, a yielding lever in operative connection withthe said valve, and an induction tube or pipe for admitting the motiveforce or power, substantially as and for the purposes specified.

In testimony that we claim the foregoing as our own we hereunto affixour signatures in presence of two witnesses.

WVILL. A. JOYNER. CHARLES N. PETESCH.

Vituesses:

ALBERT W. PORTER, GEORGE W. UNDERwooD.

